When the operator cannot see the load, the signaller becomes the operator’s eyes. Clear, consistent signals prevent misunderstandings that can drop or strike a load.
The essential signals
- Hoist (raise) and lower.
- Slew or swing left and right.
- Travel, boom up, boom down and telescope where applicable.
- Stop, emergency stop and operations complete.
Good signalling habits
- Use the standard signals agreed for the site and confirm them with the operator before lifting.
- Stand where the operator can see you and you can see the load and its path.
- Give one signal at a time, clearly and deliberately.
- Only one person signals — except for emergency stop, which anyone may give.
When hand signals are not visible, switch to radio with agreed words and a dedicated channel.
